“He was super-cool about it,” Len said. “He was one of the nice players I’ve ever met in my life. He is one of the most humble superstars you’ll ever meet. He’s like Tyson (Chandler). He’s always happy to answer any question. He genuinely wants to help you.”

The chance to work on nuances with “The Big Fundamental” was set up by Suns senior adviser Lon Babby, who served as Duncan’s agent before becoming a Suns president in 2010. Len met Duncan, a 16-time All-Star, each day to work out and then join Spurs pickup games — an option for any NBA player when visiting an opponent town in the offseason.

“He helped me a lot too with my patience, catching the ball, where you look, what action, what guys you’re looking for in cuts, reading defense,” Len said.